Andrea,
I don't know how long you have been on this list, but I recently posted my experience using a newly-purchased noise source to test a low-pass filter. The noise source approach would work for a band pass filter as well. My TinySA Ultra measurements compare very favorably with my measurements using a NanoVNA. I also simulated the filter using Elsie software and the results also compared favorably with the measured results until the gain got down to about -45 dB when the effects of real components caused the response to level-out as compared to the simulation that used ideal components. My low pass filter was also constructed on a breadboard with some short length of wire running to SMA connectors which probably affected the measured response.
The TinySA and TinySA Ultra are great tools for a very reasonable cost considering their capability!
--
Ed, K0KC
?
k0kc@...
http://k0kc.us/
